Exporting from Blender to Browser (Web Viewer)? What is the best way?
The direct successor to Blend4Web would be Verge 3D: https://www.soft8soft.com/
This is in active development and should be quite good for what you want. 

Alternatively, you could try out https://sketchfab.com/

If you want something FOSS, you might want to give Godot a try: https://www.godotengine.org/ It has  WebGL-export and the model and material transfer from Blender works rather well, but it may require somewhat more effort than the two abovementioned alternatives.